package com.cskaoyan.service;

import com.cskaoyan.mapper.AccountMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;

/**
 * @author stone
 * @date 2022/05/27 14:35
 */
@Service
public class AccountServiceImpl implements AccountService{

    @Autowired
    AccountMapper accountMapper;

    @Autowired
    TransactionTemplate transactionTemplate;

    @Override
    public void transfer(Integer fromId, Integer destId, Integer money) {
        transactionTemplate.execute(new TransactionCallback<Object>() {
            @Override
            public Object doInTransaction(TransactionStatus transactionStatus) {
                Integer fromMoney = accountMapper.selectMoneyById(fromId) - money; //转账后的money
                Integer destMoney = accountMapper.selectMoneyById(destId) + money; //转账后的money

                accountMapper.update(fromId, fromMoney);
                int i = 1 / 0;
                accountMapper.update(destId, destMoney);
                return null;
            }
        });

    }
}
